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【多选题】
下面有关通过协方差反映投资项目之间收益率变动关系的错误表述为( )。A.
协方差的绝对值越小,表示这两种资产收益率的关系越疏远
B.
协方差的值为正,表示这两种资产收益率的关系越密切
C.
协方差的值为负,表示这两种资产收益率的关系越疏远
D.
无论协方差的值为正或负,其绝对值越大,表示这两种资产收益率的关系越密切
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